Blog posting with keywords?

What could be the outcome if we are able to blog post our content with niche keywords? Does it affects your SEO skills as well? But how can you do that anyway when it comes to keyword posting? It's simple you know?

Let's say for example, if I was assigned by my client to put keywords on the content like SEO, then you have to construct phrases or sentences that your keyword SEO will be fit enough to your word. And it is so important because when it comes to search engines, the keywords like SEO are based to be typed on the search box and to see some results. Your content will be one of them, as the word SEO exist in your content or site.

It will also generate your Adsense earnings or other revenue ads like Clickbank, Chitika, WidgetBucks and other related sites.